Abstract
A set of various short artificial disturbances from rifle firings, car engine operation, car radio, shakings of the apparatus, etc., were generated deliberately near our ELF recording stations in order to identify their footprint on the recordings of atmospheric electromagnetic radiation in the Schumann resonance (SR) band (from about 2–50 Hz). Such disturbances simulate anthropogenic noises from hunters, hikers, campers, etc., which may occur in a remote-isolated ELF recording station. We expect that our work will assist fellow scientists to differentiate between artificial signals created from anthropogenic activity and real signals attributable to geophysical phenomena.
Highlights
Schumann resonances (SRs) have gained great interest in the last 20 years
The main benefit gained from the above tests is that the most important and at the same time the most difficult action is to select the proper location for the establishment of an SR observation site
The main conclusion from this work is that SR recordings are very sensitive to parasitic noise caused from anthropogenic activities
Summary
Schumann resonances (SRs) have gained great interest in the last 20 years. The reason is the recent identification of several correlations between SR activity and geophysical, even biological phenomena. This is the typical form of a possible preseismic signal identified in several cases (Christofilakis et al, 2019; Florios et al, 2019, 2020). This is a normal recording where the four main modes are present. The lack of enhancements in the frequency range of 20–30 Hz is again evident
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